=== TEST pure_python ===
import os, math
from sys import *

def foo():
  assert True, 'never gonna happen'
  return 42

def flatten(it):
  for item in it:
    yield from item

if os.path.isfile('foobar.txt'):
  print('foobar.txt exists')

assert True == True
assert object() is not object()
=== EXPECTS ===
import os, math
from sys import *

def foo():
  assert True, 'never gonna happen'
  return 42

def flatten(it):
  for item in it:
    yield from item

if os.path.isfile('foobar.txt'):
  print('foobar.txt exists')

assert True == True
assert object() is not object()
=== END ===
